<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>js示例4-5-14</title>
	<script>
		var a = 12, b = 16, c = 23.89;
		alert(a > b  && b < c);
		alert(a < b  && b < c);
	</script>
</head>
<body>
	
</body>
</html>